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Questions tagged [inverse-kinematics]

For questions about using IK in rigging. Inverse Kinematics is the opposite of the default Forward Kinematics. Instead of posing each bone in a chain from the base to the tip, IK solves the rotations of preceding bone(s) in the chain automatically based on the position of the IK-constrained bone.

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Knee going a completely different direction from the pole

As the tittle says, i'm still trying to figure out rigging, but no matter what i try, when i think i finished working with the legs, the knee bends unnaturally when i'm imitating a crouching motion ...
Sofly's user avatar
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1 vote
1 answer
109 views

Pole targets on ik rig dont guide the joint properly

I have added 2 pole targets on my rig for the 2 arms and they work as intended, they pull the elbows to the back (where the poles are located). However, i have added 2 similar ones for the knees but ...
CurSe's user avatar
  • 13
2 votes
1 answer
248 views

How to Rig a Character's Spine if the Face is Part of the Body?

So I am watching a course on rigging and most characters are human like with a normal spine and face is separated with their neck. However, my character has it's face on the body. Here's an example ...
makerbaker's user avatar
1 vote
1 answer
324 views

Scale IK Bones in Armature without Affecting other bones?

So I want to make my IK bones larger because they're small and hard to click. I tried in both edit and pose mode yet noticed that affects my entire rig. Is there a simple way to scale the IK bones ...
makerbaker's user avatar
2 votes
2 answers
205 views

Rigging mesh bends rigidly with Inverse Kinematics

I'm a beginner, trying to rig tentacles on my creature. I have added an inverse kinematic constraint to the end of the tentacle and for some reason when I move it looks very rigid instead of smooth. I ...
atkaizer's user avatar
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1 answer
55 views

specific bone wont move but other will

I'm trying to get one bone to move outward (left arm bone) but it won't move. the other one moves just fine and they (as far as I can see) have the same constraints. below is the blend file along with ...
desperrrr's user avatar
  • 654
1 vote
2 answers
527 views

IK leg flips Upwards

I'm currently advancing my rig with IK, and ran into the problem of the leg flipping full 180 when positioning it upwards. The First picture is showing how it wrongly flips. I of course want the leg ...
user140193's user avatar
3 votes
1 answer
587 views

My inverse kinematics are bugging out hard with crazy rotation issues

I've tried recalculating bone roll before applying IK. I've tried offsetting the knee join so its not perfectly 180 from the upper leg. I've tried deleting excess bones use for cloth on other rigged ...
Frofidor's user avatar
1 vote
1 answer
119 views

Arms fidgeting during simple walking animation

I'm trying to learn blender and this is pretty much my first couple weeks in. I'm trying to figure out why the arms would fidget like that I've tried messing around with graph editor but I don't get ...
Hyunwoo Lim's user avatar
0 votes
1 answer
127 views

Stopping a body part from moving

I am working on an animation of a cyclist on a bike, and I encounter a problematic situation while trying to make the rotational movement of the pedal: when I am moving the crank, the chain ring of ...
Marv's user avatar
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1 vote
1 answer
87 views

leg IK weights not deforming properly

hey sorry for the surplus of images. i am confused on why one model (the issue model) leg wont deform like the leg on the working model does even though the weights are very similar. here is the ...
desperrrr's user avatar
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791 views

How to stop IK rotation bending Bones or Mesh

When I enabled the rotation under IK, the bone with IK constraint was bent 90 degrees. I rotated the empty to fix the bend. Why did it automatically do this?
BlenderNueva's user avatar
2 votes
0 answers
42 views

why doesn't the rig follow the sphere?

Rig beginner here: I have a simple inverse kinematic rig here: The sphere is the target of the IK of Bone.00 I limited the y/z rotation like this for both bones: I do not understand, why this is the ...
Chris's user avatar
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5 votes
1 answer
1k views

Blender IK constraint not working correctly

I made a rigged character but when I wanted to add IK constraint to it, the rotation of bones became confusing : I searched youtube for the answer but the only thing that I found is changing the <...
Erfan Games's user avatar
1 vote
2 answers
1k views

How can I limit the rotation of a bone using euler angles in ik

The problem is I'm trying to limit the y rotation of the top bone in an ik chain to 0. By the way, I'm not using a pole target. When I posed ik handler, then applied the visual transform to the bone, ...
ven drick's user avatar
1 vote
1 answer
50 views

Bone constraints for tiered mechanical movement - Moving A a certain amount before B moves

Hello Blender enthousiasts! I am trying to create a tiered mechanical movement, similar to how a forklift might work. Aka the Fork can move up on the Z axis until it reaches the top of the Raising ...
Daniel de Ridder's user avatar
3 votes
1 answer
1k views

I don't see the inverse kinematics in Blender 3.0?

Could someone tell me how I add an inverse kinematics object constraint in Blender 3.0? I selected a bone in Pose Mode, then in Properties > Object Constraint Properties > Add Object Constraint, ...
Leo_xfh's user avatar
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1 answer
730 views

Cant not Limit IK Bone Rotation of bone

I Need help with the rig The image is when i using the boneIK to control finger ,The thumb2 work alright,but the thumb1 rotation out of where it should . Does IK limit rotation just work when theres ...
Andy's user avatar
  • 5
1 vote
0 answers
19 views

Why is my armature causing the knees to lock? [duplicate]

I made a full armature for my character and when I tested the movements, I noticed that the knees kinda move towards each other instead of moving straight forward.I'm not quite sure how to fix it so ...
noob97's user avatar
  • 361
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0 answers
189 views

Inverse Kinematics (IK) rigging does not work

I set up this inverse kinematics (IK) in the left foot of my char rig by following a YouTube tutorial, but the rig is not working as it is working in the video. The bone is bending in a different ...
ZUHAYR RUSHD's user avatar
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677 views

how to disable bone movement while keeping all transforms

(ignore the crazy proportions in this scene I'm just experimenting) I'm trying to make the hand IK bone (square) stay exactly where it is between frames 705-726. I have a few constraints applied to it ...
desperrrr's user avatar
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0 votes
1 answer
325 views

How do I create blendable animations for Unity that use IKs?

So, I have two animations I have made. An idle animation and a swing animation: I have tried to blend these in unity as a test for when I add in running, or sliding, etc. But I ended up with this: ...
user1539405's user avatar
2 votes
1 answer
61 views

Non-identical behaviour of symmetric armature

I did foot controls armature on the left foot and symmetrized it for the right (btw I did the same manually without symmetrizing them and the problem appeared as well). As you can see , on the picture ...
Valeriia's user avatar
  • 229
2 votes
2 answers
185 views

Change rig target control transform on 6 axis robot

In Blender I created a 6 axis robot with a control bone 'EndBone'. Bone.000 is the root bone on which all IK locks are set. On the other bones only one IK lock is cleared so movement around one axis ...
Dennis's user avatar
  • 23
1 vote
0 answers
163 views

Limit movement of IK Controller vs Armature

Before I start, I've already seen How to limit movement of a IK-chain (armature) to one plane? which kinda looks like my problem but honestly, didn't understand much. I'm not very familiar with ...
Wh1T3h4Ck5's user avatar
1 vote
1 answer
284 views

Copy rotation keep offset for the bones doesn't work

I'm following this tutorial in making IK controls for the bones. https://www.youtube.com/watch?v=VVHKBSknFhA&list=PLyelx0TsmSpcgsINPt6fOh3yWjTjk2Nz9&index=7 The problem starts with 12:40 in ...
Valeriia's user avatar
  • 229
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0 answers
355 views

how to keep the foot on the ground?

Is there a way to keep the foot joint not moving when the hip joint moving up? in blender?
fatdrogen's user avatar
  • 157
0 votes
1 answer
130 views

IK rotation control question

please see the picture below. there are 3 bones, bone A,bone B, and bone C.bone A is bone B's parent and bone A and bone B are connected. bone B has IK constraint and chain length is 2, target is bone ...
Yokomizo's user avatar
  • 415
0 votes
0 answers
359 views

inverse kinematics target goes crazy when attempting to move or adjust pole target

i was trying to move my target for my right arm IK to be able to animate the way the arm bends but when i try to move it, it seems to move the same way no matter what way i move it. the same thing ...
desperrrr's user avatar
  • 654
1 vote
1 answer
215 views

My bone is not letting me modify IK limits

First of all I'm a very beginner in terms of blender at the point that I'm still doing a course in Udemy, now we are on the rigging part of the blender course and I got my first issue. We are trying ...
Tomas Emilio Alvarez Yunginger's user avatar
0 votes
1 answer
290 views

Unable to IK rig this simple mech

I made this simple lego mech but when I try to IK rig it, the bones are always deformed and I can never adjust to a standard T pose. I tried following the royal skies tutorial but I could never get it ...
Ben 's user avatar
  • 13
0 votes
1 answer
196 views

Why are my IK bones rotating my DEF bones like so?

Any ideas as to why the IK bones of my rig are twisting the arm like so? This is of course using rigify. This doesn't occur with FK bones posed to the same position, it just appears to be happening ...
Thalia's user avatar
  • 43
1 vote
1 answer
319 views

Why do we use IK in the lower arm (fore arm) bone? How to select IK bone?

There is no issue to be solved or artefacts to be tweaked. The purpose of this question is just to better understand how IK works. I'm just curious what bone should we choose to have the IK constraint?...
user2824371's user avatar
0 votes
1 answer
182 views

Problem with the IK Rigging/ The heel bone control is not connected at it should

Noob question: Im new to Blender and I watched videos where they put the IK behind the desire joint (articulation) but when they move it its still connected to the bone. But mine is separated for some ...
Luna's user avatar
  • 1
0 votes
0 answers
269 views

Tail Armature acting weird, how do I fix it?

Followed this tutorial in rigging, https://www.youtube.com/watch?v=NjSUjiD-SvI&ab_channel=RicSanCustomToys whole body works well. Trex tail (when I select any of the three last armatures) does not ...
Ben's user avatar
  • 1
0 votes
1 answer
706 views

How do I make an IK rig with separated bones?

Ill try to make this quick, I'm new to rigging so I bought a Model for a few bucks, model came as an .fbx file (Don't know if that makes a difference.) and I imported it to Blender. Got rid of some ...
KernalKeen's user avatar
1 vote
0 answers
285 views

How to make shoulder bend properly?

I'm trying to make my shoulder bend properly and so far it looks like this: but when I try to move my hand it looks like this: I was wondering if there was a way I could limit the rotation around ...
cak3_lover's user avatar
0 votes
1 answer
22 views

Specifically control IK behaviour

I tryed to rig the landing legs of a spaceship. So I can animate them retracting. But when I try to retract them the IK bends the objects into the spaceship, instead of bending them up. Is there a way ...
Phönix 64's user avatar
0 votes
1 answer
539 views

why are rigify's IK pole targets Hidden in pose mode

I have a character parented to a rigify Armature. I want to stop my character from contorting (e.g., elbow twisted into torso area) as I set the Hand_IK. I would assume that I could use the IK pole ...
james_t's user avatar
  • 5,549
0 votes
0 answers
117 views

How do I get rigify arm IK bones to no longer aim toward origin?

I am modeling a tennis player with rigify. I have created several actions (forehand, backhand, etc), all of which work when tested alone. I did them at the origin of the scene. My problem is, when ...
Charlie Peppler's user avatar
0 votes
0 answers
1k views

How do I fix this jittery IK rig (No dependency cycles detected)

I am trying to make a mechanical arm for a humanoid, but the elbow joint needs to be double jointed so it can flex correctly. I have figured out how to make the joint flex evenly on both ends, however;...
Hectoris919's user avatar
1 vote
1 answer
100 views

Inverse Kinematics Chain Length Goes Down Wrong Branch

Trying to follow CG Geek's tutorial for making a tree rigged with inverse kinematics, however when I increase the chain length instead of progressing towards the trunk it instead goes back up a ...
Patrick Allan's user avatar
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0 answers
77 views

Rigging Artifacts

I'm playing around with Kinect mocap, I'm completely new to rigging. To get my feet wet, I'm using the resources here. I'm trying to apply the animations from the female base model to the male one. It ...
Seed Code's user avatar
1 vote
1 answer
1k views

How to prevent legs (objects ) from clipping into each other, when moving the armature

I'm a long-time reader and asking for the first time. Fairly new to blender with no prior schooling in 3D, I would like to rig an armature to a human skeleton. However, my knee joint (consisting of 3 ...
Roro's user avatar
  • 11
0 votes
0 answers
212 views

Export equipable armor parts for unity

I'm new to blender and 3D modeling, I want to export armors as parts like upper body boots, gloves, so on.. and I want to be able equip and unequip in unity game, problem is bone weights are not ...
Martian's user avatar
  • 11
1 vote
1 answer
2k views

Ik moving a leg in the wrong direction

i am trying to rig a leg, but while it works ok-ish when moving forward, it bends in a way that it is not supposed to backwards In both times i tried using shift+X to not move in the x axis, but the ...
Bot_Zero's user avatar
0 votes
2 answers
637 views

Leg glitching after adding IK constraint

I figured out the problem to my last question with the help of someone else and I successfully changed the bones from FK to IK. But now that it’s working, the leg glitches at some parts when I ...
uvennaa's user avatar
  • 35
0 votes
1 answer
881 views

Visual Keying not Properly Recording IK When Baking Animation

While animating something recently, I've come across something I've never seen before. I had just finished the following animation, and since I had used the spring bones plugin to simulate the hat ...
Toman800's user avatar
0 votes
0 answers
187 views

Hip deformation with heel IK bone

I'm trying to learn how to implement IK bones in my rig. I followed a quick YouTube tutorial. However, when I move the IK heel bone, the mesh deforms badly at the hip area. Is this because I haven't ...
Jamesy's user avatar
  • 11
1 vote
1 answer
466 views

How do you move the last bone with IK without it rotating?

I have a line of 3 bones, and I want to be able to move the last bone, without it rotating, but I also want to be able to manually rotate it outside of IK. How do I do this? I want to be able to move ...
JackHainsworth's user avatar

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